Physical science - molecular models (i need )

the attachment is below with all the direction. .

The answer to your question is:

Explanation:

See the attachment

Analysis

1.- 107.8

2.- 180°

3.- tetrahedral

answer; ////increased water pollution; ///////////////////////

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a